#include<iostream>
using namespace std;
#define add(x,y) ((x)+(y))

class student
{
public:
	int haha(int x, int y)
	{
		return x + y;
	}
private:
	double wight;
	int high;
};
class BIM
{
public:
	BIM()
	{
		_x = 100;
		_y = 10;
	}
	void  mul(double x = 1.7, int y = 50)
	{
		cout << y * 2 / x << endl;
	}
private:
	double _x;
	int _y;
};
int main()
{
	BIM x;
	BIM y;
	x.mul();
	y.mul(100,32);
	
}